Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
b858d0fbf2
This PR extends `mkTheoremFromDecl` and `mkTheoremFromExpr` to handle theorems whose conclusion is not an equality, enabling `Sym.simp` to use a broader class of lemmas as rewrite rules. Adaptations: - `¬ p` → `p = False` via `eq_false` - `p ↔ q` → `p = q` via `propext` - `p` (proposition) → `p = True` via `eq_true` Conjunctions (`p ∧ q`) are not handled here since the `SymM` E-graph aggressively splits them via case analysis. Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> |
||
|---|---|---|
| .claude | ||
| .github | ||
| .vscode | ||
| doc | ||
| images | ||
| releases_drafts | ||
| script | ||
| src | ||
| stage0 | ||
| tests | ||
| .gitattributes | ||
| .gitignore | ||
| .gitpod.Dockerfile | ||
| .gitpod.yml | ||
| .ignore | ||
| CMakeLists.txt | ||
| CMakePresets.json | ||
| CODEOWNERS | ||
| CONTRIBUTING.md | ||
| flake.lock | ||
| flake.nix | ||
| lean-toolchain | ||
| LICENSE | ||
| LICENSES | ||
| README.md | ||
| RELEASES.md | ||
This is the repository for Lean 4.
About
- Quickstart
- Homepage
- Theorem Proving Tutorial
- Functional Programming in Lean
- Documentation Overview
- Language Reference
- Release notes starting at v4.0.0-m3
- Examples
- External Contribution Guidelines
Installation
See Install Lean.
Contributing
Please read our Contribution Guidelines first.
Building from Source
See Building Lean.